• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
S P E C I A L   F... E L E C T R I C A L ... Input
S P E C I A L F... E L E C T R I C A L ... Input

... 1. All dimensions in inches and (millimeters). 2. Units are encapsulated with a low thermal resistance molding compound which has excellent chemical resistance, wide operating temperature range and good electrical properties under high humidity environments. The encapsulant and outer shell have UL94 ...
1951 , Volume v.2 n.10 , Issue June-1951
1951 , Volume v.2 n.10 , Issue June-1951

... ing frequency in 1-f circuits are vir tually non-existent. RMS distortion in the sinusoidal output is less than 1%, variation of output frequency with line voltage changes and warmup is less than 1%, and dial calibra tion is accurate within 2%. UNDERLYING CONSIDERATIONS ...
Average Current Mode PWM Controller IC
Average Current Mode PWM Controller IC

... VREF: (Voltage Reference Output) An accurate 5V reference as provided at this pin. The output can deliver 2mA to external circuitry, and is internally short circuit current limited. VREF is disabled if VCC is below UVLO. Bypass 5V REF to SGND with an 0.01µF or larger capacitor for best stability. ...
Precision Current Measurements on High Voltage Power Supply Rails
Precision Current Measurements on High Voltage Power Supply Rails

... TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide adequate design and operating safeguar ...
op-amp parameters
op-amp parameters

PT100- / PT1000 Temperature Controller UM1 PT100
PT100- / PT1000 Temperature Controller UM1 PT100

example6
example6

NS1535 / NS3035
NS1535 / NS3035

R es is tors - M ed iu m - to F as tR eac tin g F use
R es is tors - M ed iu m - to F as tR eac tin g F use

Electronics Lab #3
Electronics Lab #3

SGA2163Z 数据资料DataSheet下载
SGA2163Z 数据资料DataSheet下载

... infringement of patents, or other rights of third parties, resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time with ...
KSD201 2 NPN Epitaxial Silicon Transistor Absolute Maximum Ratings
KSD201 2 NPN Epitaxial Silicon Transistor Absolute Maximum Ratings

... DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR INTERNATIONAL. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when ...
Lecture 13 Chapter 27 Current and Resistance
Lecture 13 Chapter 27 Current and Resistance

Document
Document

Question paper - Edexcel
Question paper - Edexcel

... 9 Two wires of the same material are connected in series with a potential difference across them. Wire A has twice the cross-sectional area of wire B. The ratio ...
AC-Circuits
AC-Circuits

... • Write and apply equations for calculating the inductive and capacitive reactances for inductors and capacitors in an ac circuit. • Describe, with diagrams and equations, the phase relationships for circuits containing resistance, capacitance, and inductance. ...
gc-sda installation guide
gc-sda installation guide

... The GC-SDA is a dedicated breakout board for the Compumotor Gemini series of servo and step motor drives. The GC-SDA supports the most basic set of commonly used signals and allows the drive to fit within an 8" deep enclosure. Additional flexibility is achieved by allowing the customer to install th ...
X_Ray_Components
X_Ray_Components

Light Emitting Diodes (LED`s)
Light Emitting Diodes (LED`s)

... When light from all parts of the visible spectrum overlap one another, the additive mixture of colors appears white. However, the eye does not require a mixture of all the colors of the spectrum to perceive white light. Primary colors from the upper, middle, and lower parts of the spectrum (red, gre ...
Sampling Rate
Sampling Rate

Lab 3
Lab 3

... Laboratory Exercise 3 – Simple Semiconductor Devices: Diodes, Thermistors, and Varistors Diodes, varistors, thermistors, and transistors are semiconductor devices, constructed from at least two materials that have dissimilar resistance (or current carrying) properties. They show different resistance ...
IC 555 timer powerpoint
IC 555 timer powerpoint

... Experiment by using the Thermistor in place of R2. You may use the spray coolant to cool the thermistor – but be careful it can get super cold! 1. How does reducing the temperature of the thermistor change the output of the IC 555 timer? 2. What evidence do you have to support this? Monday July 14, ...
here
here

... z-component of the orbital magnetic dipole moment, and (c) the classical velocity of the electron’s orbit asssuming its radius is 1 nm. Magnetic Materials A solenoid has an open space inside it so that different materials can be placed inside. Describe what happens when (a) a diamagnetic material is ...
Physics for Scientists & Engineers  2
Physics for Scientists & Engineers 2

... pointing in the same direction, we assume that this component contributes a positive voltage  If we encounter a source of emf pointing in the opposite direction, we consider that component to contribute a negative voltage  Thus we will get the same information from the analysis of a simple circuit ...
Wireless Communications and Networks
Wireless Communications and Networks

... The FM and AM receivers are basically the same, however the FM receiver uses a limiter and a discriminator to remove AM variations and to convert frequency changes to amplitude variations respectively. As a result they (FM) have higher gain than AM. FM receivers give high fidelity reproduction due t ...
< 1 ... 1774 1775 1776 1777 1778 1779 1780 1781 1782 ... 2207 >

Resistive opto-isolator



Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report